macro_rules! background_size {
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
css_macros::easy_enum! {background-size auto cover contain [unit]} => { ... };
}